Barcelona is 1 hour ahead of London. London uses GMT/BST while Barcelona uses Central European Time (CET/CEST). When it's 12:00 PM in London, it's 1:00 PM in Barcelona.
Both cities observe daylight saving time on the same schedule, so the 1-hour difference remains constant year-round.
Best calling time: 8:00 AM - 4:00 PM London time. This corresponds to 9:00 AM - 5:00 PM in Barcelona, covering Spanish business hours.
London and Barcelona are connected by direct flights taking about 2 hours. Both are major European business and tourism centers with significant exchange of tourists and business travelers.